Luminescence and scintillation properties of Cs3BiCl6 crystals |
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| Affiliation: | 1. Department of Applied Chemistry, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;2. Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara 630-0192, Japan;3. Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan;1. Department of Chemistry, College of William and Mary, Williamsburg, VA 23187, USA;2. Department of Chemistry, University of Maine, Orono, ME 04469, USA;3. Department of Chemistry, College of New Jersey, Ewing, NJ 08628-0718, USA;1. College of Physics, Jilin University, Changchun 130012, China;2. State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China;3. State Centre for International Cooperation on Designer Low-carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;4. Dalian Nationalities Univ, Key Lab New Energy & Rare Earth Resource Utilizat, Key Lab Photosensit Mat & Devices Liaoning Prov, State Ethn Affairs Commiss, Sch Phys & Mat Engn, 18 Liaohe West Rd, Dalian 116600, China;1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, PR China |
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| Abstract: | The optical and scintillation properties of Cs3BiCl6 single crystals were characterized, and absorption properties were investigated for thin films. The thin films showed two absorption bands at ～220 nm and 330 nm; these bands can be attributed to the 1A1g → 1T1u and 1A1g → 3T1u transitions of Bi3+ ions, respectively. A luminescence band was observed at ～390 nm in the photoluminescence spectra; this band can be attributed to the 3T1u → 1A1g transition of Bi3+ ions. In the X-ray-induced radioluminescence spectrum, in addition to the luminescence band at 390 nm, another band was observed at 600–700 nm; this band was tentatively attributed to the radiative recombination of self-trapped excitons. The decay-time constants of photoluminescence and scintillation decay were of the order of nanoseconds. The scintillation light yield was 800 photons/MeV. The results indicate that Cs3BiCl6 has a fast scintillation decay and a relatively poor light yield. |
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| Keywords: | Scintillator Gamma-ray |
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